exploded right out of the gate with the youngest star, 16-year-old ze dndaya and her partner with the lead. She shook loose. While newly minted super bowl winner jacoby jones and his partner, karina, fired off and became the ones to watch. The excitement causing her to break out into the squirrel. How do you feel about four performance from week one. It was all right. I got a lot to learn. The posture. Reporter: You keep hearing about it? Yes. Postu posture, smile, and the stows. Reporter: Toes, clearly a sore spot. Them things right there? This is not even the heel. You hit my toe, I'm going down. A hit to the chin, a punch to the face. I can take it. Step on my toe? Reporter: What do you call him when he's in trouble? Jacoby jones. If he's in really big trouble, jacoby rashad jones. Reporter: As for the youngest star, pronouncing her name is the least of her worries. You just go by the one name. Zendaya, like madonna. Reporter: One name. Good company. Madonna the beyonce. Reporter: Cher. You're too young for cher. Youngest on the tes tant ever on "dancing with the stars" and you killed it. How did it feel? It feels amazing. I'm tries to understand that it happened. Now it's about working harder and just proving that at the's not all I can do. Reporter: For "good morning america," cameron mathison, abc news, los angeles.

This transcript has been automatically generated and may not be 100% accurate.

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